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6 Episodes
S4 E1 - Episode 1
S4 E2 - Episode 2
S4 E3 - Episode 3
S4 E4 - Episode 4
S4 E5 - Episode 5
S4 E6 - Episode 6
Streaming, rent, or buy Line of Duty – Season 4:
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Synopsis
The fourth series sees AC-12 facing their most devious opponent yet! Under pressure from her superiors, DCI Roz Huntley charges a young man with a series of murders after months of fruitless investigation, but is he guilty? The Chief Forensic Investigator has doubts and turns to AC-12.
